Route 201 provides service between the Gaithersburg Park and Ride lot located at I-270 and MD 124 in Montgomery County and BWI Thurgood Marshall Airport. The 201 Route operates seven days a week, 365 days a year with a multi-stop route offering hourly service in both directions. There are 34 one-way trips available on weekdays and 30 one-way trips available on weekends and holidays pre-determined and listed on the schedule.